Being realistic about a foreigner moving into the country for reasons other than a business venture.
Money is tight, to say the least...no wonder he owns a cactus. (Needs little resources and can be tapped for hydration should water become an issue)

[hider=#cactusundere][img]http://img07.deviantart.net/d243/i/2013/343/c/6/ah_the_cactus__the_most_tsundere_of_plants___by_mante_pls-d6xcvae.png[/img][/hider]